Release 03/2004
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Operating Instructions (Compact) OP 77B
6AV6691-1EA01-0AB0
5–7
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77B
5.3 Operating the Project
Softkeys with global function assignment
A softkey with global function assignment always
triggers the same action on the HMI device or PLC
regardless of the screen currently open. These actions
include:
•
Calling in a screen
•
Printing the screen displayed
Within a screen, a softkey can only have one function
assigned – either global or local. In the case of local
and global functions, the local function has priority.
Softkeys with local function assignment
A softkey with a local function assignment relates to a
specific screen and, thus, is only effective in the active
screen.
The function of a softkey can vary from screen to
screen.
The two-row softkeys are particularly suitable for
implementing binary states and machine functions, as
illustrated in the following screen.
OFF
ON
STOP
START
–
+
Figure 5–6
Example of two row, labeled keys
